Metal-cutting tool.



J. I. MISENER, F. E. SKROBACK & W. S. SANDERS.

METAL CUTHNG TOOL.

APPLICATION man ran. 16 I911.

Patented Oct. 29, 1918,

INVENTORS TTORNE Y8 UNITED sTA'rEs ENT OFFICE.

JOHN' I. MISENER, FRANK E. SKROBACK. AND WILLIAM 5.,SANDERS, OF SYRACUSE,

NEW YORK, ASSIGNORS, BY

DIRECT AND MESNE ASSIGNMENTS, TO MISENER 8:

IRVING MANUFACTURING 00.. INQ. OF SYRACUSE, NEW YORK, A CORPORATION OF NEW YORK.

META L-CUITING TOOL.

Specification of Letters Patent.

Patented Oct. 29. 1918.

To all whom. it may concern:

Be it known that we. .loux I. MISENER, FRANK E. Sunotueu. and WILLnn S. SAN- nous, ot' S \'1'tl(llS4.. in the county of Onondaga and St ate of New York. ha e invented a certain new and. useful Metal-Cutting Tool. of which the following: is a specifieat-ion.

This invention has for its ohjeet a particularly simple and highly ellicient metal cutting tool of which the t'ollowinn is a specification.

The object of this invention is to provide an inexpensive tool. which will readily cut circular holes of different diameters wi h the use of one cutting edge. and one that will make a central hearing; and cut. the circular hole in one oieration. ()thcr ohjects will appear througlumt the specification.

ln descrihing: this invention. reference is had to the accompanying: drawing in which like characters designate corresponding; parts in all of the views.

Figure 1 is a sectional view partly in ele vation and partly hroken awa v of this metal cut ing tool.

Fig. 2 is an inverted face view of the Same.

Fig. 1:5 is a diagrammatic view of the out ter for this tool. The expanded and contracted positions of the cutter being shown in dott d lines.

This invention comprises generally a rotatine head. circular grooves in the head concentric with the axis of rotation of the head and an arc-shaped hachsaw fixed in one of said grooves. lt also preferably includes means extending head for forming a central beurinr therefor.

This tool is particularly adapted for use with a hand-operated device as a hand drill or the like. hut obviously is just as eflicient when used with ptover-operated devices.

1 is the headwhich is provided with a part .2 for clamping it. in a device for rotating the same.

As illustrated in Fig. 2 the head 1 is pref erahly circular and is provided with a. substantially flat face 3 disposed ata right angle to the axis of rotation of said head.

lircular grooves 4 are formed in said fiat face concentric with the axis of rotation of the head 1. The face 3 is for convenience and. for brevity a e r ferred to in the axially from the specification and claims as flat and preferahl is flat.

The cutter 5 in the preferable form of this invention comprises a flat hacksaw or metal saw formed in an arc with the usual teeth (3 set. as customary with saws Of this character.

ln the drawings. the head 1 is shown as provided with three circular grooves 4 and the saw blade 5 is bent to conform to the size of the intermediate groove and as illustrated in Fig. 9 can be ex iandcd or contracted to conform to either of the other grooves.

()hviousl v. one saw hlade can he used to cut circula" holes of different diameters with one holder or head.

instead of the hlude being in the form of an arc. the ends could be fixed together. thus ftr'ming a rin; of the saw blade. but for cheapness of construction, the ends are preferahlv separated.

in use the saw blade is sprung into one of the concentric grooves 4 and is held from movement relatively to the rotation of the head 1 h v means of a pin 7 extending radi ully into the head t from the outer diameter thereof and passing through the grooves and through one end 9 of the saw hlade.

The saw blade is prefcrahlv held from the front end thereof. as the grooves are made wide enough to readily admit the thickness of the and a saw hladc held. as illustrated. rcadil conforms to the inner diameter of the grooves. which is the desired diameter. and being: held from the front end also prevents the saw from buckling.

'lhe gloovcs 4 are of a uniform depth and the saw blades are of a uniform width and when a blade is inserted in one of the grooves it is of sufficient width to extend hcyond the fiat face 3 thereof and the cutting surface thereof is parallel to said'flat face.

The rotary head 1 is n'ovidcd with means for forming a central earing'for the tool and as here shown. a passage 9 is formed therein and extends axially thereof from the flat face 3 through the head and into the part 2. A drill 10 is held in said passage 9 by a set screw 11, and the cutting surface 0 said drill extends beyond the fiat face 8 of the head 1, and beyond the teeth 8 of the ar shaped haoksaw.

in use, the operator first locates the center where the hole is to be cut and places the point of the drill 10 thereon; upon rotation of the head 1, the drill 10 cuts a small hole in the metal, which hole centers the areshaped hacksaw with respect to the hole to be cut and forms a central bearing for the tool.

Upon further rotation of the head, the teeth of the hacksaw come in contact with the surface to be cut and as arranged, resent a large cutting face to said sur ace, thereby cutting through the same very rapidly.

A tool as described, is very simple in construction and inexpensive to manufacture and is highly efiicient and durable in use.

\Vhat we claim is:

1. A metal cutting tool Comprising a rotary head, having a flat face with a circular groove therein concentric with the axis of rotation thereof, and an arcshaped hacksaw in said groove with the cutting edge thereof extending beyond and parallel with the Hat face of the rotary head and a means at one end of the hacksaw for holding the same from rotative movement relatively to the head, substantially as and for the purpose set forth.

2. A metal cutting tool comprising a rotary head, having a flat face with a circular groove therein concentric with the axis of rotation thereof, an arcsl1aped hacksaw fixed therein with its cutting edge extending beyond and parallel to the fiat face thereof, and a part extending axially from the head for centering the tool, substantially as and for the purpose described.

3. A metal cutting tool comprising a rotary head, having a flat face with a circular groove therein concentric with the axis of rotation thereof. an arc-shaped hacks-aw fixed therein at one end thereof with its cut.- ting edge extending beyond and parallel to the flat face thereof, and a drill held concentric with said head for forming a central bearing therefor, substantially as and for the purpose specified. 7.

4. A metal cutting tool comprising a rotary head, having a fiat face with circular grooves therein concentric with the axis of rotation thereof, an arc-shaped hacksaw conforming to any of said grooves with the cut ting edge extending beyond and parallel to the flat face of the head, and means at one end of said hacksaw for holding the same from rotative movement relative to the head, substantially as and for the purpose set forth.

5. A tool for cutting circular holes oom- Erising a hacksaw, a head having means for ending and frlctionally holding the saw in an arc and means for securing the saw to the head at one point near one end of the saw and holding the saw from relative endwise movement, the remainder ofthe saw being free to conform to the are of the holding means, substantially as and for the purpose described.

6. A metal cutting tool for cutting circular holes comprising a rotary head, having a fiat face with circular grooves therein con centric with the axis of rotation thereof, a hacks-aw bent in the form of an arc, the hacksaw being of less thickness than the width of said grooves, and means at one end of said hacksaw for conforming the same to one side wall of any one of said grooves and holding it from rotative movement relatively thereto, substantially as andfor the purpose specified.

7. A metal cutting tool for cutting circular holes comprising a rotary head, having a Hat face with circular grooves therein concentric with the axis of rotation thereof, a hacksaw bent in the form of an arc, the hacksaw being of less thickness than the Width of said grooves and means at the forward end of said hacksaw for conforming the same to the inner side Wall of any one of said grooves and holding it from rotative movement relatively thereto, substantially as and for the purpose set forth.

8. A metal cutting tool for cutting circular holes comprising a rotary head, having a flat face with circular grooves therein conccntricvvith the axis of rotation thereof, a hacksaw bent in the form of an arc, the hacksaw being of less thickness than the Width of said grooves, and means, as a pin, extending radially into said rotary head through said grooves and through the forward end of said hacksaw for conforming the same to the inner side wall of any one of said grooves and holding it from rotative movement relatively thereto, substantially as and for the purpose described.

In testi ony whereof, we have hereunto signed our mes in the presence of two attesting Witnesses, at Syracuse, in the county of Onondaga, in the State of New York, this 13th day of February, 1917.

JOH I. MISENER.

E. SKROBACK, 

